Buckle



FIG. 1 is a perspective view of a buckle showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a side elevational view thereof, the opposite side being identical thereto;

FIG. 5 is a right end view thereof; and _

FIG. 6 is a left end view thereof. 

The ornamental design for a buckle, as shown and described. 